Gage attachment for woodworking-machines



GAGE ATTACHMENT FOR WOODWORKING MACHINES.

APPLICATION FILED MAR.12, I918.

' Patented June 1, 1920.

2 SHEETSSHEET 1.

Mlql

' H. L. HURFF. GAGE ATTACHMENT FOR WOODWORKING MACHINES.

APPLICATION FILED MAR.12, I918.

Patehted June 1, 1920.

' 2 SHEETSSHEET 2.

UNITED STATES PAT oFFIcE,

HARRY L. HURFF, OF PEORIA, ILLINOIS.

To all whom it may concern: 7

Be it known that I, IIARRY L. HURFF, a citizen of the United States, a resident of Peoria, in the county of Peoria and State of Illinois, have invented new and useful Improvements in Gage Attachments for Woodworking-Machines, of which the followmg is a specification.

My invention relates to improvements in indicating means for wood Working machines, and the principal object is the pro: vision of means whereby the position of the wood working devices relative to the frame of the machine and relative to each other, are indicated coincident with their adjustments. V

A further object of this invention is the provision of means on-a wood working'machine having a plurality of wood working devices, of indicating the adjustment of the devices relative to the frame of the machine and relative to each other, this latter including the distance between them and their relative vertical position.

Another object of this invention is the provision in combination with a plurality of cutters of a tenoning machine, of indicating means for indicating the depth of the lower shoulder of the tenon, the thickness of the tenon and the distance one cutter is offset from the other.

To the accomplishment of the foregoing j and such other objects as may hereinafter appear, my inventlon conslsts 1n the combination, construction and arrangement of parts hereinafter. described and then sought to be defined in the appended claims, reference being had to the accompanying drawings forming a part hereof, and which,

show merely for the purpose of illustrative disclosure, a preferred embodiment ofnmy invention, it being understood that various changes may be made in practice within the scope of the claims without digressing from my inventive idea.

In the drawings, r

Figure 1 is a front elevation of the upper part of a wood working machine, such as a tenoning machine, shown somewhat diagrammatically, with a mechanism construct ed to embody my invention, applied thereto: Fig. 2 is a side elevation of the left hand side of the mechanism shown in Fig. 1; v

Fig. 3 is a side elevation on anenlarged scale of the various parts comprising one embodiment of my invention;

Specification of Letters Patent.

GAGE ATTACHMENT FOR woonwoaizrirsvmcn'mns.

Patented June 1, 1920.

Application filed March 12, 1918. SeriaI No. 221,971.

Fig. 4 is a front elevation of thesame part shown 1n F 1g. 3; the method of attachment to thc'frame of the wood working maembodiment of my invention, for the purpose of multiplying the indication so as to make the reading of the indicator easy;

Flg. 8 1s a detailed view of a tenon that has been cut, showing the various measurements that are indicated by my invention.

In wood working machines and particularly tenoning machines at present in use, 1n order to obtain the proper thickness of the tenon and also the proper depth of the end shoulder, and also the proper alinement between the shoulders or the off-set rela tion therebetween, if that is desired, it is necessary to run an experimental piece of stock through the machine. It is obvious thatthis method of adjustment is inefficient and inconvenient to say the least, and therefore, have provided in connection with the tenoning machine, indicating means which will indicate the thickness of the tenon, the

depth of the lower shoulder, and the position of the cutters relative to each other, this lndlcating means being capable of being readily attached to existing types of machines with a minimum amount of trouble and expense.

I Referring now to the drawings, in which I have illustrated in a more or less fragmentary and diagrammatic manner one type ofv tenoning machine, the numeral 1 desinates the main frame of the machine, having the upper portion 2 and the carriage 3 which supports and moves the stock. This form ofmachine utilizes two cutters, the upper one being designated 4: and the lower one. 5. The head stock 6 of cutter 4 is adjustable vertically in upper part 2 of the relative to the frame of the machine by means of the screw construction 10. By

only be cleterminecl by the means of these various ad"ustments, the

height of the shoulder A (Flg. 8) is determined, the thickness of the tenon B isdetermined and the amountof off set G between the upper and lower cutters, is determined. This mechanism, operation and means and manner of adjustment are embodied in mamean passing through the elongated slots 12. This gage barll is provided on part of its outer face with the scale 13 reading both ways from afi-Xed point, which I have marl' edo (zero), This manner of markin is, of course, arbitmry. Embracing this gage bar 11 and slidable thereon, is the indicating member 14: which is secured to the v head stock 6 of the uppercutter 4: by means of the bolt 15 and provided with the opening or aperture 16,and has one end of this a erture provideChwith the notch or recess 1''? which correspondswithone half of the 0 (zero) marking on the scale 13. Thain,- dicating bar 18 issec'ured as at'19, to the upper part 2 of the machine and has its indicating portion extending'across in front ofithe opening 16 in the member 14, and the scale/13 11 the member 11, being provided with the notch or recess 20' corresponding substantially with the lower half the 0 (Zero) marking and adapted to cooperate at 0 Y (Zero) adjustment with the notch or recess 17 in the member 14: to form a '0 (Zero). It is to be recalled that the gage bar 11 is connected to the head stock 8 of the lower cutter and, of course, movable therewith, and that the indicating member" 14 is connected to the head stock 6 of th upper cutter and movable therewith. There fore, the position ofth'e gage bar ll and indicating. member 14 relative to e'ach' other, will indicate the relative position b'et'weei'i the two cutters and also in view of the fact that thei-ndicating member or arm 18 is secured to the upper part 2, of the main frame of the machine, the position of the scale of the gage bar-.111 relative to this indicating arm member '18 willhidicate the relative positionof the lower cutter to the frame,"and

therefore the depth of the shoulder A (Fig. 8), therelative position between the cutters indicating the thickness of the tenon B (res)- s In order to indicate the position of the upper cutter 4 laterally with respect to the co-incidently' with any'adjustment, the positlon of the lower cutter withrespect to the frame or carriage of the mach ne, and therelower cutter 5, I secure to the head stock I I providethis scale I have provided a very simple construct on for indicating by indicate the depth of the cut or shoulder A (Fig.8), and also the distance fbetwejei i the upper cutter and the lower cutter which determines the (thickness of the ten'on (Fig. 8), and also the position of the' tw'o cutters relative to eachfothe'r" asfindicated by the'o'if set distance C (Fig. 8); 1 H

-VVe will assume for the purpose of exam ple, that-the indicating means are in the adjustments shown in Fig. 5 which is substam tially 0 (Zero). This means that the cutters V are as close togetheras they can be adjusted and practically on aline with the top ofthe carriage, arid therefore, the bottom line of the stock. Itis desi'recl toicut a tenonhav ing a lower shoulder of thejd'epth A (F 8), the upper cutter 'havingbeen moved out ofthe way the lower cutter is moved up wardly, which, of course, moves the gage bar 11 and accordingly moveslth'e O (Zero)v point on the scale 13 thereofupwardly from the indicating bar 18. Vhen the distance between the 0 (Zero) mark on therscale and the indicating bar or member '18 equals the distance A, the operator knows that that ad j ustment is complete and correct.

Assuming further that the tenon is to cut of'a thickness B (Fig. 8), the operator moves the head s't'ock and upper cutter 4 inf the proper direction, which, of course, moves the member 14 until the dist the 0 (Zero) mark on the scale l li and the indicating notch 17011 the upper edge fof'the. opening .16 into th'e 'm'oinber 131. corresponds to the distance B (Fig. when"theop erarcc between t v tor knows that this amuse-hemis complete and correct. plete if it IS desired to cut the upper and lower-shoulders of the tenon in ijer'tical alinement, but if one is to be oif-setff rom the other, the operator moves the upper head stock to the right by means of the screw connection 10 untilthe point'cnor finger 23 indicate's'on the scale'21, the dis tance 'C (Fig. 8), When heknowsthat adjustment is 'complet'e ahdfprope'r. The

The adjustment is no'w' com work can then be run through the machine without the-necessity of further adjustment or experimenting. y

In-order to make the indications plainly readable, it is advisable at times to provide a scale or indicator in which the indications are multiplied, and I provide this by the mechanism shown in Fig. '7. The are shaped scale 24 issecured to the stationary frame of the machine. The one pointer 25 is connected to the head stock for the upper cutter l and the other pointer 26 is Connected to the head stock of the lower cutter. The same operation and adjustment of the cutters will produce the indication on the scale, the same as in the mechanism previously described, with the exception that the indication will be some predetermined multiple of the dimensions, as determined, of course, by the leverage of the pointers.

While I have described this invention and shown it applied to tenoning machines, it is obvious that it may be capable of use with other types of devices, wherein the same adjustments and working conditions are met, and that my invention is not to be limited to this disclosure, except as by the scope of the following claims.

What I claim is: i

1. An indicating means including in com bination, an elongated bar member adapted to be connected to a vertically movable element to move therewith, said bar member having an 1nd1cat1ng scale provlded on one face thereof, another member cooperating with said bar member and moving over the indicating scale thereon and having an opening therein with one edge of said opening adapted to cooperate with said scale to indicate, said other member being adapted to be connected to another vertically movable element to move therewith, whereby the relative position of the two movable elements is indicated and a third member adapted to be connected to stationary means and to cooperate with said scale and said other member so that when the bar member and said other member are moved for adjusting purposes their relative position to a permanent stationary position will be indicated. 7

2. An indicating means, including, in combination, a bar member adapted to be connected to a vertically moving element to move therewith, said bar member having a scale, another member cooperating with said bar member and the scale thereon to indicate, said other member being adapted to be connected to another vertically moving element to move therewith whereby the relative position of the two movable elements is indicated, and a third member adapted to be connected to the stationary means with which the scale and said other member cooperate for indicating purposes.

3. An indicating means, including, in combination, a bar member adapted to be connected to a vertically moving element to move therewith, said bar member having a scale, another member cooperating with said 7 barmember and the scale thereon to'indicate, said other member being adapted to be connected to another vertically movlng element to move therewith whereby the relative position of the two movable elements is indicated, and a third member adapted to be connected to the stationary means with which the scale and said other member cooperate for indicating purposes, and a twopart indicating means adapted to be connected with one of said vertically movable means so as to indicate its relative hori- Zontal displacement.

4:. An indicating means for a tenoning machine having a main frame, a plurality of head stocks vertically adjustable in said main frame, a cutter mounted in each head stock and means for adjusting one of said cutters laterally with respect to the other, I

said'indicating means including, in combination, an indicating member adapted to be connected to each head stock and to move vertically therewith and to cooperate to indicate the relative position of the cutters to each other, and another indicatingmember adapted to be secured to the frame of the machine so as to cooperate with said first mentioned indicating members to indicate the relative position of the cutters to the frame of the machine.

5. An indicating means for a tenoning machine having a main frame, a plurality of head stocks vertically adjustable in said main frame, a cutter mounted in each head stock and means for adjusting one of said cutters laterally with respect to the other, said indicating means including, in combination, an indicating bar adapted to be secured to the lower head stock and having a scale provided thereon, an indicating member adapted to be secured to the upper head stock to move therewith and. to cooperate with said scale so as to indicate the relative distance between the two cutters,

and a stationary indicating means adapted bination, an indicating member adapted to be connected to each head stock and to move vertically therewith and to cooperate to indicate the relative position of the cutters to each other, and another indicating member adapted to be secured to the frame of the machine so as to cooperate with said firstmentioned indicating members to indicate the relative position of the cutters t0 the frame of the machine, and a two-part indicating mechanism mounted' on the head cutter in reference to the frame- 10 In it-HESS whereof, I have hereunto affixed my hand this 9th day of March, 1918.

' HARRY'L; HURFF. 

